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主頁 > 知識(shí)庫 > Docker下安裝zookeeper(單機(jī)和集群)

Docker下安裝zookeeper(單機(jī)和集群)

啟動(dòng)Docker后，先看一下我們有哪些選擇。

有官方的當(dāng)然選擇官方啦~

下載：

[root@localhost admin]# docker pull zookeeper
Using default tag: latest
Trying to pull repository docker.io/library/zookeeper ...
latest: Pulling from docker.io/library/zookeeper
1ab2bdfe9778: Already exists
7aaf9a088d61: Pull complete
80a55c9c9fe8: Pull complete
a0086b0e6eec: Pull complete
4165e7457cad: Pull complete
bcba13bcf3a1: Pull complete
41c03a109e47: Pull complete
4d5281c6b0d4: Pull complete
Digest: sha256:175d6bb1471e1e37a48bfa41a9da047c80fade60fd585eae3a0e08a4ce1d39ed
Status: Downloaded newer image for docker.io/zookeeper:latest

查看鏡像詳情

[root@localhost admin]# docker images
REPOSITORY          TAG         IMAGE ID      CREATED       SIZE
192.168.192.128:443/hello-2  latest       0c24558dd388    42 hours ago    660 MB
192.168.192.128:443/hello   latest       a3ba3d430bed    42 hours ago    660 MB
docker.io/nginx        latest       5a3221f0137b    13 days ago     126 MB
docker.io/zookeeper      latest       3487af26dee9    13 days ago     225 MB
docker.io/registry      latest       f32a97de94e1    5 months ago    25.8 MB
docker.io/mongo        latest       8bf72137439e    12 months ago    380 MB
docker.io/influxdb      latest       34de2bdc2d7f    12 months ago    213 MB
docker.io/centos       latest       5182e96772bf    12 months ago    200 MB
docker.io/grafana/grafana   latest       3e16e05be9a3    13 months ago    245 MB
docker.io/hello-world     latest       2cb0d9787c4d    13 months ago    1.85 kB
docker.io/java        latest       d23bdf5b1b1b    2 years ago     643 MB
[root@localhost admin]# docker inspect 3487af26dee9
[
  {
    "Id": "sha256:3487af26dee9ef9eacee9a97521bc4f0243bef0b285247258c32f4a03cab92c5",
    "RepoTags": [
      "docker.io/zookeeper:latest"
    ],
    "RepoDigests": [
      "docker.io/zookeeper@sha256:175d6bb1471e1e37a48bfa41a9da047c80fade60fd585eae3a0e08a4ce1d39ed"
    ],
    "Parent": "",
    "Comment": "",
    "Created": "2019-08-15T06:10:50.178554969Z",
    "Container": "9a38467115f1952161d6075135d5c5287967282b834cfe68183339c810f9652b",
    "ContainerConfig": {
      "Hostname": "9a38467115f1",
      "Domainname": "",
      "User": "",
      "AttachStdin": false,
      "AttachStdout": false,
      "AttachStderr": false,
      "ExposedPorts": {
        "2181/tcp": {},
        "2888/tcp": {},
        "3888/tcp": {},
        "8080/tcp": {}
      },
      "Tty": false,
      "OpenStdin": false,
      "StdinOnce": false,
      "Env": [
        "PATH=/usr/local/openjdk-8/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/apache-zookeeper-3.5.5-bin/bin",
        "LANG=C.UTF-8",
        "JAVA_HOME=/usr/local/openjdk-8",
        "JAVA_VERSION=8u222",
        "JAVA_BASE_URL=https://github.com/AdoptOpenJDK/openjdk8-upstream-binaries/releases/download/jdk8u222-b10/OpenJDK8U-jre_",
        "JAVA_URL_VERSION=8u222b10",
        "ZOO_CONF_DIR=/conf",
        "ZOO_DATA_DIR=/data",
        "ZOO_DATA_LOG_DIR=/datalog",
        "ZOO_LOG_DIR=/logs",
        "ZOO_TICK_TIME=2000",
        "ZOO_INIT_LIMIT=5",
        "ZOO_SYNC_LIMIT=2",
        "ZOO_AUTOPURGE_PURGEINTERVAL=0",
        "ZOO_AUTOPURGE_SNAPRETAINCOUNT=3",
        "ZOO_MAX_CLIENT_CNXNS=60",
        "ZOO_STANDALONE_ENABLED=true",
        "ZOO_ADMINSERVER_ENABLED=true",
        "ZOOCFGDIR=/conf"
      ],
      "Cmd": [
        "/bin/sh",
        "-c",
        "#(nop) ",
        "CMD [\"zkServer.sh\" \"start-foreground\"]"
      ],
      "ArgsEscaped": true,
      "Image": "sha256:20bf3cc1bd5b5766b79da5265e94007d0802ce241df1636d0f63e211a79a0e3e",
      "Volumes": {
        "/data": {},
        "/datalog": {},
        "/logs": {}
      },
      "WorkingDir": "/apache-zookeeper-3.5.5-bin",
      "Entrypoint": [
        "/docker-entrypoint.sh"
      ],
      "OnBuild": null,
      "Labels": {}
    },
    "DockerVersion": "18.06.1-ce",
    "Author": "",
    "Config": {
      "Hostname": "",
      "Domainname": "",
      "User": "",
      "AttachStdin": false,
      "AttachStdout": false,
      "AttachStderr": false,
      "ExposedPorts": {
        "2181/tcp": {},
        "2888/tcp": {},
        "3888/tcp": {},
        "8080/tcp": {}
      },
      "Tty": false,
      "OpenStdin": false,
      "StdinOnce": false,
      "Env": [
        "PATH=/usr/local/openjdk-8/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/apache-zookeeper-3.5.5-bin/bin",
        "LANG=C.UTF-8",
        "JAVA_HOME=/usr/local/openjdk-8",
        "JAVA_VERSION=8u222",
        "JAVA_BASE_URL=https://github.com/AdoptOpenJDK/openjdk8-upstream-binaries/releases/download/jdk8u222-b10/OpenJDK8U-jre_",
        "JAVA_URL_VERSION=8u222b10",
        "ZOO_CONF_DIR=/conf",
        "ZOO_DATA_DIR=/data",
        "ZOO_DATA_LOG_DIR=/datalog",
        "ZOO_LOG_DIR=/logs",
        "ZOO_TICK_TIME=2000",
        "ZOO_INIT_LIMIT=5",
        "ZOO_SYNC_LIMIT=2",
        "ZOO_AUTOPURGE_PURGEINTERVAL=0",
        "ZOO_AUTOPURGE_SNAPRETAINCOUNT=3",
        "ZOO_MAX_CLIENT_CNXNS=60",
        "ZOO_STANDALONE_ENABLED=true",
        "ZOO_ADMINSERVER_ENABLED=true",
        "ZOOCFGDIR=/conf"
      ],
      "Cmd": [
        "zkServer.sh",
        "start-foreground"
      ],
      "ArgsEscaped": true,
      "Image": "sha256:20bf3cc1bd5b5766b79da5265e94007d0802ce241df1636d0f63e211a79a0e3e",
      "Volumes": {
        "/data": {},
        "/datalog": {},
        "/logs": {}
      },
      "WorkingDir": "/apache-zookeeper-3.5.5-bin",
      "Entrypoint": [
        "/docker-entrypoint.sh"
      ],
      "OnBuild": null,
      "Labels": null
    },
    "Architecture": "amd64",
    "Os": "linux",
    "Size": 225126346,
    "VirtualSize": 225126346,
    "GraphDriver": {
      "Name": "overlay2",
      "Data": {
        "LowerDir": "/var/lib/docker/overlay2/92185ebf7638a7b34180cfb87795dd758405cbad4fd0139b92a227d1a4b61847/diff:/var/lib/docker/overlay2/8787e91f5c03a7c03cee072019eca49a0402a0a0902be39ed0b5d651a79cce35/diff:/var/lib/docker/overlay2/ce5864ddfa4d1478047aa9fcaa03744e8a4078ebe43b41e7836c96c54c724044/diff:/var/lib/docker/overlay2/fc99437bcfbabb9e8234c06c90d1c60e58c34ac053aff1adc368b7ad3a50c158/diff:/var/lib/docker/overlay2/1779297a8980830229bd4bf58bd741730956d6797332fd07b863a1b48dcb6fa2/diff:/var/lib/docker/overlay2/ee735aa3608d890ac4751dd93581a67cb54a5dd4714081e9d09d0ebd9dbc3501/diff:/var/lib/docker/overlay2/cf6b3cbc42f3c8d1fb09b29db0dafbb4dceb120925970ab8a3871eaa8562414c/diff",
        "MergedDir": "/var/lib/docker/overlay2/a7fcc1b78c472cde943f20d1d4495f145308507b5fe3da8800c33dc4ce426156/merged",
        "UpperDir": "/var/lib/docker/overlay2/a7fcc1b78c472cde943f20d1d4495f145308507b5fe3da8800c33dc4ce426156/diff",
        "WorkDir": "/var/lib/docker/overlay2/a7fcc1b78c472cde943f20d1d4495f145308507b5fe3da8800c33dc4ce426156/work"
      }
    },
    "RootFS": {
      "Type": "layers",
      "Layers": [
        "sha256:1c95c77433e8d7bf0f519c9d8c9ca967e2603f0defbf379130d9a841cca2e28e",
        "sha256:2bf534399acac9c6b09a0b1d931223808000b04400a749f08187ed9ee435738d",
        "sha256:eb25e0278d41b9ac637d8cb2e391457cf44ce8d2bfe0646d0c9faefc96413f91",
        "sha256:e54bd3566d9ef3e1309a5af6caf8682f32c6ac4d6adfcbd3e601cfee4e2e0e85",
        "sha256:c79435051d529a7b86f5f9fc32e7e2ec401929434e5596f02a2af731f55c9f28",
        "sha256:76e0d7b2d700e6d17924b985703c7b5b84fb39ddcc0a1181b41217c2a11dffc4",
        "sha256:eecdc37df6afd77091641588f9639f63b65e8eb141e56529e00da44419c5bd04",
        "sha256:36e788f2d91a89375df5901f31cca33776f887c00ddfd3cf9f2466fa4cb794d6"
      ]
    }
  }
]

默認(rèn)拉取最新的是3.5.X版本，如果你需要3.4.X版本的，要指定標(biāo)簽

單機(jī)

# 最后那個(gè)是鏡像的ID[root@localhost admin]# docker run -d -p 2181:2181 --name some-zookeeper --restart always 3487af26dee9
d5c6f857cd88c342acf63dd58e838a4cdf912daa6c8c0115091147136e819307
[root@localhost admin]# docker ps
CONTAINER ID    IMAGE        COMMAND         CREATED       STATUS       PORTS                         NAMES
d5c6f857cd88    3487af26dee9    "/docker-entrypoin..."  4 seconds ago    Up 3 seconds    2888/tcp, 3888/tcp, 0.0.0.0:2181->2181/tcp, 8080/tcp  some-zookeeper
[root@localhost admin]# docker exec -it d5c6f857cd88 bash
root@d5c6f857cd88:/apache-zookeeper-3.5.5-bin# ./bin/zkCli.sh
Connecting to localhost:2181
2019-08-29 07:15:21,623 [myid:] - INFO [main:Environment@109] - Client environment:zookeeper.version=3.5.5-390fe37ea45dee01bf87dc1c042b5e3dcce88653, built on 05/03/2019 12:07 GMT
2019-08-29 07:15:21,679 [myid:] - INFO [main:Environment@109] - Client environment:host.name=d5c6f857cd88
2019-08-29 07:15:21,680 [myid:] - INFO [main:Environment@109] - Client environment:java.version=1.8.0_222
2019-08-29 07:15:21,717 [myid:] - INFO [main:Environment@109] - Client environment:java.vendor=Oracle Corporation
2019-08-29 07:15:21,718 [myid:] - INFO [main:Environment@109] - Client environment:java.home=/usr/local/openjdk-8
2019-08-29 07:15:21,725 [myid:] - INFO [main:Environment@109] - Client environment:java.class.path=/apache-zookeeper-3.5.5-bin/bin/../zookeeper-server/target/classes:/apache-zookeeper-3.5.5-bin/bin/../build/classes:/apache-zookeeper-3.5.5-bin/bin/../zookeeper-server/target/lib/*.jar:/apache-zookeeper-3.5.5-bin/bin/../build/lib/*.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/zookeeper-jute-3.5.5.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/zookeeper-3.5.5.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/slf4j-log4j12-1.7.25.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/slf4j-api-1.7.25.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/netty-all-4.1.29.Final.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/log4j-1.2.17.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/json-simple-1.1.1.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jline-2.11.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jetty-util-9.4.17.v20190418.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jetty-servlet-9.4.17.v20190418.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jetty-server-9.4.17.v20190418.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jetty-security-9.4.17.v20190418.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jetty-io-9.4.17.v20190418.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jetty-http-9.4.17.v20190418.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/javax.servlet-api-3.1.0.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jackson-databind-2.9.8.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jackson-core-2.9.8.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/jackson-annotations-2.9.0.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/commons-cli-1.2.jar:/apache-zookeeper-3.5.5-bin/bin/../lib/audience-annotations-0.5.0.jar:/apache-zookeeper-3.5.5-bin/bin/../zookeeper-*.jar:/apache-zookeeper-3.5.5-bin/bin/../zookeeper-server/src/main/resources/lib/*.jar:/conf:
2019-08-29 07:15:22,108 [myid:] - INFO [main:Environment@109] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2019-08-29 07:15:22,109 [myid:] - INFO [main:Environment@109] - Client environment:java.io.tmpdir=/tmp
2019-08-29 07:15:22,109 [myid:] - INFO [main:Environment@109] - Client environment:java.compiler=<NA>
2019-08-29 07:15:22,109 [myid:] - INFO [main:Environment@109] - Client environment:os.name=Linux
2019-08-29 07:15:22,109 [myid:] - INFO [main:Environment@109] - Client environment:os.arch=amd64
2019-08-29 07:15:22,110 [myid:] - INFO [main:Environment@109] - Client environment:os.version=3.10.0-862.9.1.el7.x86_64
2019-08-29 07:15:22,110 [myid:] - INFO [main:Environment@109] - Client environment:user.name=root
2019-08-29 07:15:22,110 [myid:] - INFO [main:Environment@109] - Client environment:user.home=/root
2019-08-29 07:15:22,110 [myid:] - INFO [main:Environment@109] - Client environment:user.dir=/apache-zookeeper-3.5.5-bin
2019-08-29 07:15:22,118 [myid:] - INFO [main:Environment@109] - Client environment:os.memory.free=11MB
2019-08-29 07:15:22,148 [myid:] - INFO [main:Environment@109] - Client environment:os.memory.max=247MB
2019-08-29 07:15:22,148 [myid:] - INFO [main:Environment@109] - Client environment:os.memory.total=15MB
2019-08-29 07:15:22,206 [myid:] - INFO [main:ZooKeeper@868] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@3b95a09c
2019-08-29 07:15:22,239 [myid:] - INFO [main:X509Util@79] - Setting -D jdk.tls.rejectClientInitiatedRenegotiation=true to disable client-initiated TLS renegotiation
2019-08-29 07:15:22,285 [myid:] - INFO [main:ClientCnxnSocket@237] - jute.maxbuffer value is 4194304 Bytes
2019-08-29 07:15:22,366 [myid:] - INFO [main:ClientCnxn@1653] - zookeeper.request.timeout value is 0. feature enabled=
Welcome to ZooKeeper!
JLine support is enabled
2019-08-29 07:15:22,563 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1112] - Opening socket connection to server localhost/0:0:0:0:0:0:0:1:2181. Will not attempt to authenticate using SASL (unknown error)
2019-08-29 07:15:23,443 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@959] - Socket connection established, initiating session, client: /0:0:0:0:0:0:0:1:37198, server: localhost/0:0:0:0:0:0:0:1:2181
2019-08-29 07:15:23,520 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1394] - Session establishment complete on server localhost/0:0:0:0:0:0:0:1:2181, sessionid = 0x10001216d990000, negotiated timeout = 30000
 
WATCHER::
 
WatchedEvent state:SyncConnected type:None path:null
[zk: localhost:2181(CONNECTED) 0] ls /
[zookeeper]
[zk: localhost:2181(CONNECTED) 1] quit
 
WATCHER::
 
WatchedEvent state:Closed type:None path:null
2019-08-29 07:15:37,042 [myid:] - INFO [main:ZooKeeper@1422] - Session: 0x10001216d990000 closed
2019-08-29 07:15:37,043 [myid:] - INFO [main-EventThread:ClientCnxn$EventThread@524] - EventThread shut down for session: 0x10001216d990000
root@d5c6f857cd88:/apache-zookeeper-3.5.5-bin# exit
exit
[root@localhost admin]#

在外部訪問（192.168.192.128:2181）

集群

環(huán)境：單臺(tái)宿主機(jī)（192.168.192.128），啟動(dòng)三個(gè)zookeeper容器。

這里涉及一個(gè)問題，就是Docker容器之間通信的問題，這個(gè)很重要！

Docker有三種網(wǎng)絡(luò)模式，bridge、host、none，在你創(chuàng)建容器的時(shí)候，不指定--network默認(rèn)是bridge。

bridge：為每一個(gè)容器分配IP，并將容器連接到一個(gè)docker0虛擬網(wǎng)橋，通過docker0網(wǎng)橋與宿主機(jī)通信。也就是說，此模式下，你不能用宿主機(jī)的IP+容器映射端口來進(jìn)行Docker容器之間的通信。

host：容器不會(huì)虛擬自己的網(wǎng)卡，配置自己的IP，而是使用宿主機(jī)的IP和端口。這樣一來，Docker容器之間的通信就可以用宿主機(jī)的IP+容器映射端口

none：無網(wǎng)絡(luò)。

=====================================================

先在本地創(chuàng)建目錄：

[root@localhost admin]# mkdir /usr/local/zookeeper-cluster
[root@localhost admin]# mkdir /usr/local/zookeeper-cluster/node1
[root@localhost admin]# mkdir /usr/local/zookeeper-cluster/node2
[root@localhost admin]# mkdir /usr/local/zookeeper-cluster/node3
[root@localhost admin]# ll /usr/local/zookeeper-cluster/
total 0
drwxr-xr-x. 2 root root 6 Aug 28 23:02 node1
drwxr-xr-x. 2 root root 6 Aug 28 23:02 node2
drwxr-xr-x. 2 root root 6 Aug 28 23:02 node3

然后執(zhí)行命令啟動(dòng)

docker run -d -p 2181:2181 -p 2888:2888 -p 3888:3888 --name zookeeper_node1 --privileged --restart always \

-v /usr/local/zookeeper-cluster/node1/volumes/data:/data \

-v /usr/local/zookeeper-cluster/node1/volumes/datalog:/datalog \

-v /usr/local/zookeeper-cluster/node1/volumes/logs:/logs \

-e ZOO_MY_ID=1 \

-e "ZOO_SERVERS=server.1=192.168.192.128:2888:3888;2181 server.2=192.168.192.128:2889:3889;2182 server.3=192.168.192.128:2890:3890;2183" 3487af26dee9

docker run -d -p 2182:2181 -p 2889:2888 -p 3889:3888 --name zookeeper_node2 --privileged --restart always \

-v /usr/local/zookeeper-cluster/node2/volumes/data:/data \

-v /usr/local/zookeeper-cluster/node2/volumes/datalog:/datalog \

-v /usr/local/zookeeper-cluster/node2/volumes/logs:/logs \

-e ZOO_MY_ID=2 \

-e "ZOO_SERVERS=server.1=192.168.192.128:2888:3888;2181 server.2=192.168.192.128:2889:3889;2182 server.3=192.168.192.128:2890:3890;2183" 3487af26dee9

docker run -d -p 2183:2181 -p 2890:2888 -p 3890:3888 --name zookeeper_node3 --privileged --restart always \

-v /usr/local/zookeeper-cluster/node3/volumes/data:/data \

-v /usr/local/zookeeper-cluster/node3/volumes/datalog:/datalog \

-v /usr/local/zookeeper-cluster/node3/volumes/logs:/logs \

-e ZOO_MY_ID=3 \

-e "ZOO_SERVERS=server.1=192.168.192.128:2888:3888;2181 server.2=192.168.192.128:2889:3889;2182 server.3=192.168.192.128:2890:3890;2183" 3487af26dee9

【坑】

乍一看，沒什么問題啊，首先映射端口到宿主機(jī)，然后三個(gè)zookeeper之間的訪問地址則是宿主機(jī)IP:映射端口，沒毛病啊；

看我前面講的網(wǎng)絡(luò)模式就能看出問題，ZOO_SERVERS里面的IP有問題，犯這個(gè)錯(cuò)誤都是不了解Docker的網(wǎng)絡(luò)模式的。什么錯(cuò)誤往下看。

關(guān)于ZOO_SERVERS

什么意思呢，3.5.0開始，不應(yīng)該再使用clientPort和clientPortAddress配置參數(shù)。相反，這些信息現(xiàn)在是server關(guān)鍵字規(guī)范的一部分。

端口映射三個(gè)容器不一樣，比如2181/2182/2183，因?yàn)槭且慌_(tái)宿主機(jī)嘛，端口不能沖突，如果你不在同一臺(tái)機(jī)器，就不用修改端口。

最后的那個(gè)參數(shù)是鏡像ID，也可以是鏡像名稱:TAG。

--privileged=true參數(shù)是為了解決【chown: changing ownership of '/data': Permission denied】，也可以省略true

執(zhí)行結(jié)果：

[root@localhost admin]# docker run -d -p 2181:2181 -p 2888:2888 -p 3888:3888 --name zookeeper_node1 --privileged --restart always \

> -v /usr/local/zookeeper-cluster/node1/volumes/data:/data \

> -v /usr/local/zookeeper-cluster/node1/volumes/datalog:/datalog \

> -v /usr/local/zookeeper-cluster/node1/volumes/logs:/logs \

> -e ZOO_MY_ID=1 \

> -e "ZOO_SERVERS=server.1=192.168.192.128:2888:3888;2181 server.2=192.168.192.128:2889:3889;2182 server.3=192.168.192.128:2890:3890;2183" 3487af26dee9
4bfa6bbeb936037e178a577e5efbd06d4a963e91d67274413b933fd189917776
[root@localhost admin]# docker run -d -p 2182:2181 -p 2889:2888 -p 3889:3888 --name zookeeper_node2 --privileged --restart always \

> -v /usr/local/zookeeper-cluster/node2/volumes/data:/data \

> -v /usr/local/zookeeper-cluster/node2/volumes/datalog:/datalog \

> -v /usr/local/zookeeper-cluster/node2/volumes/logs:/logs \

> -e ZOO_MY_ID=2 \

> -e "ZOO_SERVERS=server.1=192.168.192.128:2888:3888;2181 server.2=192.168.192.128:2889:3889;2182 server.3=192.168.192.128:2890:3890;2183" 3487af26dee9
dbb7f1f323a09869d043152a4995e73bad5f615fd81bf11143fd1c28180f9869
[root@localhost admin]# docker run -d -p 2183:2181 -p 2890:2888 -p 3890:3888 --name zookeeper_node3 --privileged --restart always \

> -v /usr/local/zookeeper-cluster/node3/volumes/data:/data \

> -v /usr/local/zookeeper-cluster/node3/volumes/datalog:/datalog \

> -v /usr/local/zookeeper-cluster/node3/volumes/logs:/logs \

> -e ZOO_MY_ID=3 \

> -e "ZOO_SERVERS=server.1=192.168.192.128:2888:3888;2181 server.2=192.168.192.128:2889:3889;2182 server.3=192.168.192.128:2890:3890;2183" 3487af26dee9
6dabae1d92f0e861cc7515c014c293f80075c2762b254fc56312a6d3b450a919
[root@localhost admin]#

查看啟動(dòng)的容器

[root@localhost admin]# docker ps
CONTAINER ID    IMAGE        COMMAND         CREATED       STATUS       PORTS                                       NAMES
6dabae1d92f0    3487af26dee9    "/docker-entrypoin..."  31 seconds ago   Up 29 seconds    8080/tcp, 0.0.0.0:2183->2181/tcp, 0.0.0.0:2890->2888/tcp, 0.0.0.0:3890->3888/tcp  zookeeper_node3
dbb7f1f323a0    3487af26dee9    "/docker-entrypoin..."  36 seconds ago   Up 35 seconds    8080/tcp, 0.0.0.0:2182->2181/tcp, 0.0.0.0:2889->2888/tcp, 0.0.0.0:3889->3888/tcp  zookeeper_node2
4bfa6bbeb936    3487af26dee9    "/docker-entrypoin..."  46 seconds ago   Up 45 seconds    0.0.0.0:2181->2181/tcp, 0.0.0.0:2888->2888/tcp, 0.0.0.0:3888->3888/tcp, 8080/tcp  zookeeper_node1
[root@localhost admin]#

不是說有錯(cuò)誤嗎？怎么還啟動(dòng)成功了？？我們來看下節(jié)點(diǎn)1的啟動(dòng)日志

[root@localhost admin]# docker logs -f 4bfa6bbeb936
ZooKeeper JMX enabled by default

...

2019-08-29 09:20:22,665 [myid:1] - WARN [WorkerSender[myid=1]:QuorumCnxManager@677] - Cannot open channel to 2 at election address /192.168.192.128:3889
java.net.ConnectException: Connection refused (Connection refused)
  at java.net.PlainSocketImpl.socketConnect(Native Method)
  at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
  at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
  at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
  at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
  at java.net.Socket.connect(Socket.java:589)
  at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:648)
  at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:705)
  at org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:618)
  at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:477)
  at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:456)
  at java.lang.Thread.run(Thread.java:748)
2019-08-29 09:20:22,666 [myid:1] - WARN [WorkerSender[myid=1]:QuorumCnxManager@677] - Cannot open channel to 3 at election address /192.168.192.128:3890
java.net.ConnectException: Connection refused (Connection refused)
  at java.net.PlainSocketImpl.socketConnect(Native Method)
  at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
  at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
  at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
  at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
  at java.net.Socket.connect(Socket.java:589)
  at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:648)
  at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:705)
  at org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:618)
  at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:477)
  at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:456)
  at java.lang.Thread.run(Thread.java:748)

連接不上2 和 3，為什么呢，因?yàn)樵谀J(rèn)的Docker網(wǎng)絡(luò)模式下，通過宿主機(jī)的IP+映射端口，根本找不到啊！他們有自己的IP啊！如下：

[root@localhost admin]# docker ps
CONTAINER ID    IMAGE        COMMAND         CREATED       STATUS       PORTS                                       NAMES
6dabae1d92f0    3487af26dee9    "/docker-entrypoin..."  5 minutes ago    Up 5 minutes    8080/tcp, 0.0.0.0:2183->2181/tcp, 0.0.0.0:2890->2888/tcp, 0.0.0.0:3890->3888/tcp  zookeeper_node3
dbb7f1f323a0    3487af26dee9    "/docker-entrypoin..."  6 minutes ago    Up 6 minutes    8080/tcp, 0.0.0.0:2182->2181/tcp, 0.0.0.0:2889->2888/tcp, 0.0.0.0:3889->3888/tcp  zookeeper_node2
4bfa6bbeb936    3487af26dee9    "/docker-entrypoin..."  6 minutes ago    Up 6 minutes    0.0.0.0:2181->2181/tcp, 0.0.0.0:2888->2888/tcp, 0.0.0.0:3888->3888/tcp, 8080/tcp  zookeeper_node1


[root@localhost admin]# docker inspect 4bfa6bbeb936
      "Networks": {
        "bridge": {
          "IPAMConfig": null,
          "Links": null,
          "Aliases": null,
          "NetworkID": "5fc1ce4362afe3d34fdf260ab0174c36fe4b7daf2189702eae48101a755079f3",
          "EndpointID": "368237e4c903cc663111f1fe33ac4626a9100fb5a22aec85f5eccbc6968a1631",
          "Gateway": "172.17.0.1",
          "IPAddress": "172.17.0.2",
          "IPPrefixLen": 16,
          "IPv6Gateway": "",
          "GlobalIPv6Address": "",
          "GlobalIPv6PrefixLen": 0,
          "MacAddress": "02:42:ac:11:00:02"
        }
      }
    }
  }
]

[root@localhost admin]# docker inspect dbb7f1f323a0
      "Networks": {
        "bridge": {
          "IPAMConfig": null,
          "Links": null,
          "Aliases": null,
          "NetworkID": "5fc1ce4362afe3d34fdf260ab0174c36fe4b7daf2189702eae48101a755079f3",
          "EndpointID": "8a9734044a566d5ddcd7cbbf6661abb2730742f7c73bd8733ede9ed8ef106659",
          "Gateway": "172.17.0.1",
          "IPAddress": "172.17.0.3",
          "IPPrefixLen": 16,
          "IPv6Gateway": "",
          "GlobalIPv6Address": "",
          "GlobalIPv6PrefixLen": 0,
          "MacAddress": "02:42:ac:11:00:03"
        }
      }
    }
  }
]

[root@localhost admin]# docker inspect 6dabae1d92f0
      "Networks": {
        "bridge": {
          "IPAMConfig": null,
          "Links": null,
          "Aliases": null,
          "NetworkID": "5fc1ce4362afe3d34fdf260ab0174c36fe4b7daf2189702eae48101a755079f3",
          "EndpointID": "b10329b9940a07aacb016d8d136511ec388de02bf3bd0e0b50f7f4cbb7f138ec",
          "Gateway": "172.17.0.1",
          "IPAddress": "172.17.0.4",
          "IPPrefixLen": 16,
          "IPv6Gateway": "",
          "GlobalIPv6Address": "",
          "GlobalIPv6PrefixLen": 0,
          "MacAddress": "02:42:ac:11:00:04"
        }
      }
    }
  }
]

node1---172.17.0.2
node2---172.17.0.3
node3---172.17.0.4

既然我們知道了它有自己的IP，那又出現(xiàn)另一個(gè)問題了，就是它的ip是動(dòng)態(tài)的，啟動(dòng)之前我們無法得知。有個(gè)解決辦法就是創(chuàng)建自己的bridge網(wǎng)絡(luò)，然后創(chuàng)建容器的時(shí)候指定ip。

【正確方式開始】

[root@localhost admin]# docker network create --driver bridge --subnet=172.18.0.0/16 --gateway=172.18.0.1 zoonet
8257c501652a214d27efdf5ef71ff38bfe222c3a2a7898be24b8df9db1fb3b13
[root@localhost admin]# docker network ls
NETWORK ID     NAME        DRIVER       SCOPE
5fc1ce4362af    bridge       bridge       local
6aa33e21444e    host        host        local
20e563b93ce9    none        null        local
8257c501652a    zoonet       bridge       local
[root@localhost admin]# docker network inspect 8257c501652a
[
  {
    "Name": "zoonet",
    "Id": "8257c501652a214d27efdf5ef71ff38bfe222c3a2a7898be24b8df9db1fb3b13",
    "Created": "2019-08-29T06:08:01.442601483-04:00",
    "Scope": "local",
    "Driver": "bridge",
    "EnableIPv6": false,
    "IPAM": {
      "Driver": "default",
      "Options": {},
      "Config": [
        {
          "Subnet": "172.18.0.0/16",
          "Gateway": "172.18.0.1"
        }
      ]
    },
    "Internal": false,
    "Attachable": false,
    "Containers": {},
    "Options": {},
    "Labels": {}
  }
]

然后我們修改一下zookeeper容器的創(chuàng)建命令。

docker run -d -p 2181:2181 --name zookeeper_node1 --privileged --restart always --network zoonet --ip 172.18.0.2 \

-v /usr/local/zookeeper-cluster/node1/volumes/data:/data \

-v /usr/local/zookeeper-cluster/node1/volumes/datalog:/datalog \

-v /usr/local/zookeeper-cluster/node1/volumes/logs:/logs \

-e ZOO_MY_ID=1 \

-e "ZOO_SERVERS=server.1=172.18.0.2:2888:3888;2181 server.2=172.18.0.3:2888:3888;2181 server.3=172.18.0.4:2888:3888;2181" 3487af26dee9

docker run -d -p 2182:2181 --name zookeeper_node2 --privileged --restart always --network zoonet --ip 172.18.0.3 \

-v /usr/local/zookeeper-cluster/node2/volumes/data:/data \

-v /usr/local/zookeeper-cluster/node2/volumes/datalog:/datalog \

-v /usr/local/zookeeper-cluster/node2/volumes/logs:/logs \

-e ZOO_MY_ID=2 \

-e "ZOO_SERVERS=server.1=172.18.0.2:2888:3888;2181 server.2=172.18.0.3:2888:3888;2181 server.3=172.18.0.4:2888:3888;2181" 3487af26dee9

docker run -d -p 2183:2181 --name zookeeper_node3 --privileged --restart always --network zoonet --ip 172.18.0.4 \

-v /usr/local/zookeeper-cluster/node3/volumes/data:/data \

-v /usr/local/zookeeper-cluster/node3/volumes/datalog:/datalog \

-v /usr/local/zookeeper-cluster/node3/volumes/logs:/logs \

-e ZOO_MY_ID=3 \

-e "ZOO_SERVERS=server.1=172.18.0.2:2888:3888;2181 server.2=172.18.0.3:2888:3888;2181 server.3=172.18.0.4:2888:3888;2181" 3487af26dee9

1. 由于2888 、3888不需要暴露，就不映射了；

2. 指定自己的網(wǎng)絡(luò)，并指定IP；

3. 每個(gè)容器之間環(huán)境是隔離的，所以容器內(nèi)所用的端口一樣：2181/2888/3888

運(yùn)行結(jié)果：

[root@localhost admin]# docker run -d -p 2181:2181 --name zookeeper_node1 --privileged --restart always --network zoonet --ip 172.18.0.2 \

> -v /usr/local/zookeeper-cluster/node1/volumes/data:/data \

> -v /usr/local/zookeeper-cluster/node1/volumes/datalog:/datalog \

> -v /usr/local/zookeeper-cluster/node1/volumes/logs:/logs \

> -e ZOO_MY_ID=1 \

> -e "ZOO_SERVERS=server.1=172.18.0.2:2888:3888;2181 server.2=172.18.0.3:2888:3888;2181 server.3=172.18.0.4:2888:3888;2181" 3487af26dee9
50c07cf11fab2d3b4da6d8ce48d8ed4a7beaab7d51dd542b8309f781e9920c36
[root@localhost admin]# docker run -d -p 2182:2181 --name zookeeper_node2 --privileged --restart always --network zoonet --ip 172.18.0.3 \

> -v /usr/local/zookeeper-cluster/node2/volumes/data:/data \

> -v /usr/local/zookeeper-cluster/node2/volumes/datalog:/datalog \

> -v /usr/local/zookeeper-cluster/node2/volumes/logs:/logs \

> -e ZOO_MY_ID=2 \

> -e "ZOO_SERVERS=server.1=172.18.0.2:2888:3888;2181 server.2=172.18.0.3:2888:3888;2181 server.3=172.18.0.4:2888:3888;2181" 3487af26dee9
649a4dbfb694504acfe4b8e11b990877964477bb41f8a230bd191cba7d20996f
[root@localhost admin]# docker run -d -p 2183:2181 --name zookeeper_node3 --privileged --restart always --network zoonet --ip 172.18.0.4 \

> -v /usr/local/zookeeper-cluster/node3/volumes/data:/data \

> -v /usr/local/zookeeper-cluster/node3/volumes/datalog:/datalog \

> -v /usr/local/zookeeper-cluster/node3/volumes/logs:/logs \

> -e ZOO_MY_ID=3 \

> -e "ZOO_SERVERS=server.1=172.18.0.2:2888:3888;2181 server.2=172.18.0.3:2888:3888;2181 server.3=172.18.0.4:2888:3888;2181" 3487af26dee9
c8bc1b9ae9adf86e9c7f6a3264f883206c6d0e4f6093db3200de80ef39f57160
[root@localhost admin]# docker ps
CONTAINER ID    IMAGE        COMMAND         CREATED       STATUS       PORTS                         NAMES
c8bc1b9ae9ad    3487af26dee9    "/docker-entrypoin..."  17 seconds ago   Up 16 seconds    2888/tcp, 3888/tcp, 8080/tcp, 0.0.0.0:2183->2181/tcp  zookeeper_node3
649a4dbfb694    3487af26dee9    "/docker-entrypoin..."  22 seconds ago   Up 21 seconds    2888/tcp, 3888/tcp, 8080/tcp, 0.0.0.0:2182->2181/tcp  zookeeper_node2
50c07cf11fab    3487af26dee9    "/docker-entrypoin..."  33 seconds ago   Up 32 seconds    2888/tcp, 3888/tcp, 0.0.0.0:2181->2181/tcp, 8080/tcp  zookeeper_node1
[root@localhost admin]#

進(jìn)入容器內(nèi)部驗(yàn)證一下：

[root@localhost admin]# docker exec -it 50c07cf11fab bash
root@50c07cf11fab:/apache-zookeeper-3.5.5-bin# ./bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower
root@50c07cf11fab:/apache-zookeeper-3.5.5-bin# exit
exit
[root@localhost admin]# docker exec -it 649a4dbfb694 bash
root@649a4dbfb694:/apache-zookeeper-3.5.5-bin# ./bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: leader
root@649a4dbfb694:/apache-zookeeper-3.5.5-bin# exit
exit
[root@localhost admin]# docker exec -it c8bc1b9ae9ad bash
root@c8bc1b9ae9ad:/apache-zookeeper-3.5.5-bin# ./bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower
root@c8bc1b9ae9ad:/apache-zookeeper-3.5.5-bin# exit
exit
[root@localhost admin]#

在驗(yàn)證一下創(chuàng)建節(jié)點(diǎn)

開啟防火墻，以供外部訪問

firewall-cmd --zone=public --add-port=2181/tcp --permanent
firewall-cmd --zone=public --add-port=2182/tcp --permanent
firewall-cmd --zone=public --add-port=2183/tcp --permanent
systemctl restart firewalld
firewall-cmd --list-all

在本地，我用zookeeper的客戶端連接虛擬機(jī)上的集群：

可以看到連接成功！

集群安裝方式二：通過docker stack deploy或docker-compose安裝

這里用docker-compose。先安裝docker-compose

[root@localhost admin]# curl -L "https://github.com/docker/compose/releases/download/1.24.1/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
 % Total  % Received % Xferd Average Speed  Time  Time   Time Current
                 Dload Upload  Total  Spent  Left Speed
100  617  0  617  0   0  145   0 --:--:-- 0:00:04 --:--:--  145
100 15.4M 100 15.4M  0   0  131k   0 0:02:00 0:02:00 --:--:-- 136k
[root@localhost admin]# chmod +x /usr/local/bin/docker-compose

檢查版本（驗(yàn)證是否安裝成功）

[root@localhost admin]# docker-compose --version
docker-compose version 1.24.1, build 4667896b

卸載的話

rm /usr/local/bin/docker-compose

開始配置，新建三個(gè)掛載目錄

[root@localhost admin]# mkdir /usr/local/zookeeper-cluster/node4
[root@localhost admin]# mkdir /usr/local/zookeeper-cluster/node5
[root@localhost admin]# mkdir /usr/local/zookeeper-cluster/node6

新建任意目錄，然后在里面新建一個(gè)文件

[root@localhost admin]# mkdir DockerComposeFolder
[root@localhost admin]# cd DockerComposeFolder/
[root@localhost DockerComposeFolder]# vim docker-compose.yml

文件內(nèi)容如下：（自定義網(wǎng)絡(luò)見上面）

version: '3.1'

services:
 zoo1:
  image: zookeeper
  restart: always
  privileged: true
  hostname: zoo1
  ports:
   - 2181:2181
  volumes: # 掛載數(shù)據(jù)
   - /usr/local/zookeeper-cluster/node4/data:/data
   - /usr/local/zookeeper-cluster/node4/datalog:/datalog
  environment:
   ZOO_MY_ID: 4
   ZOO_SERVERS: server.4=0.0.0.0:2888:3888;2181 server.5=zoo2:2888:3888;2181 server.6=zoo3:2888:3888;2181
  networks:
   default:
    ipv4_address: 172.18.0.14

 zoo2:
  image: zookeeper
  restart: always
  privileged: true
  hostname: zoo2
  ports:
   - 2182:2181
  volumes: # 掛載數(shù)據(jù)
   - /usr/local/zookeeper-cluster/node5/data:/data
   - /usr/local/zookeeper-cluster/node5/datalog:/datalog
  environment:
   ZOO_MY_ID: 5
   ZOO_SERVERS: server.4=zoo1:2888:3888;2181 server.5=0.0.0.0:2888:3888;2181 server.6=zoo3:2888:3888;2181
  networks:
   default:
    ipv4_address: 172.18.0.15

 zoo3:
  image: zookeeper
  restart: always
  privileged: true
  hostname: zoo3
  ports:
   - 2183:2181
  volumes: # 掛載數(shù)據(jù)
   - /usr/local/zookeeper-cluster/node6/data:/data
   - /usr/local/zookeeper-cluster/node6/datalog:/datalog
  environment:
   ZOO_MY_ID: 6
   ZOO_SERVERS: server.4=zoo1:2888:3888;2181 server.5=zoo2:2888:3888;2181 server.6=0.0.0.0:2888:3888;2181
  networks:
   default:
    ipv4_address: 172.18.0.16

networks: # 自定義網(wǎng)絡(luò)
 default:
  external:
   name: zoonet

注意yaml文件里不能有tab，只能有空格。

關(guān)于version與Docker版本的關(guān)系如下：

然后執(zhí)行（-d后臺(tái)啟動(dòng)）

docker-compose -f docker-compose.yml up -d

查看已啟動(dòng)的容器

[root@localhost DockerComposeFolder]# docker ps
CONTAINER ID    IMAGE        COMMAND         CREATED       STATUS       PORTS                         NAMES
a2c14814037d    zookeeper      "/docker-entrypoin..."  6 minutes ago    Up About a minute  2888/tcp, 3888/tcp, 8080/tcp, 0.0.0.0:2183->2181/tcp  dockercomposefolder_zoo3_1
50310229b216    zookeeper      "/docker-entrypoin..."  6 minutes ago    Up About a minute  2888/tcp, 3888/tcp, 0.0.0.0:2181->2181/tcp, 8080/tcp  dockercomposefolder_zoo1_1
475d8a9e2d08    zookeeper      "/docker-entrypoin..."  6 minutes ago    Up About a minute  2888/tcp, 3888/tcp, 8080/tcp, 0.0.0.0:2182->2181/tcp  dockercomposefolder_zoo2_1

進(jìn)入一個(gè)容器

[root@localhost DockerComposeFolder]# docker exec -it a2c14814037d bash
root@zoo3:/apache-zookeeper-3.5.5-bin# ./bin/zkCli.sh
Connecting to localhost:2181

....

WatchedEvent state:SyncConnected type:None path:null
[zk: localhost:2181(CONNECTED) 0] 
[zk: localhost:2181(CONNECTED) 1] ls /
[zookeeper]
[zk: localhost:2181(CONNECTED) 2] create /hi
Created /hi
[zk: localhost:2181(CONNECTED) 3] ls /
[hi, zookeeper]

進(jìn)入另一個(gè)容器

[root@localhost DockerComposeFolder]# docker exec -it 50310229b216 bash
root@zoo1:/apache-zookeeper-3.5.5-bin# ./bin/zkCli.sh
Connecting to localhost:2181

...

WatchedEvent state:SyncConnected type:None path:null

[zk: localhost:2181(CONNECTED) 0] ls /
[hi, zookeeper]

本地客戶端連接集群：

zkCli.cmd -server 192.168.192.128:2181,192.168.192.128:2182,192.168.192.128:2183

查看

停止所有活動(dòng)容器

刪除所有已停止的容器

更多docker-compose的命令：

[root@localhost DockerComposeFolder]# docker-compose --help
Define and run multi-container applications with Docker.

Usage:
 docker-compose [-f <arg>...] [options] [COMMAND] [ARGS...]
 docker-compose -h|--help

Options:
 -f, --file FILE       Specify an alternate compose file
               (default: docker-compose.yml)
 -p, --project-name NAME   Specify an alternate project name
               (default: directory name)
 --verbose          Show more output
 --log-level LEVEL      Set log level (DEBUG, INFO, WARNING, ERROR, CRITICAL)
 --no-ansi          Do not print ANSI control characters
 -v, --version        Print version and exit
 -H, --host HOST       Daemon socket to connect to

 --tls            Use TLS; implied by --tlsverify
 --tlscacert CA_PATH     Trust certs signed only by this CA
 --tlscert CLIENT_CERT_PATH Path to TLS certificate file
 --tlskey TLS_KEY_PATH    Path to TLS key file
 --tlsverify         Use TLS and verify the remote
 --skip-hostname-check    Don't check the daemon's hostname against the
               name specified in the client certificate
 --project-directory PATH  Specify an alternate working directory
               (default: the path of the Compose file)
 --compatibility       If set, Compose will attempt to convert keys
               in v3 files to their non-Swarm equivalent

Commands:
 build       Build or rebuild services
 bundle       Generate a Docker bundle from the Compose file
 config       Validate and view the Compose file
 create       Create services
 down        Stop and remove containers, networks, images, and volumes
 events       Receive real time events from containers
 exec        Execute a command in a running container
 help        Get help on a command
 images       List images
 kill        Kill containers
 logs        View output from containers
 pause       Pause services
 port        Print the public port for a port binding
 ps         List containers
 pull        Pull service images
 push        Push service images
 restart      Restart services
 rm         Remove stopped containers
 run        Run a one-off command
 scale       Set number of containers for a service
 start       Start services
 stop        Stop services
 top        Display the running processes
 unpause      Unpause services
 up         Create and start containers
 version      Show the Docker-Compose version information

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